This handy Math in Focus Grade 3 Workbook Answer Key Chapter 19 Practice 5 More Perimeter detailed solutions for the textbook questions.

## Math in Focus Grade 3 Chapter 19 Practice 5 Answer Key More Perimeter

**Measure the sides of each figure with a ruler. Then find the perimeter.**

Question 1.

Answer:

5 inches.

Explanation:

Perimeter of a triangle is the sum of the lengths of the triangle.

the lengths are measured with ruler and the total is perimeter (P) = 5 inches

Question 2.

Answer:

10 inches

Explanation:

Perimeter of a parallelogram is the sum of the lengths of the parallelogram

the lengths are measured with ruler and the total is perimeter (P) = 10 inches

Question 3.

Answer:

10 cm

Explanation:

Perimeter of a pentagon is the sum of the sides length of the pentagon

the lengths are measured with ruler and the total is perimeter (P) = 10 cm

**Complete. Find the perimeter of each figure. Remember to show the correct unit in your answer.**

Question 4.

Perimeter

= _______ + _______ + _______ + _______

= ______________

Answer: 20 cm

Explanation:

The perimeter P of a rectangle is given by the formula, P=l + w + l + w ,

where l is the length and w is the width of the rectangle.

Perimeter of a rectangle = l + w + l + w ,

= 6 + 4 + 6 + 4

= 20 cm

Question 5.

Perimeter

= _______ + _______ + _______ + _______

= ______________

Answer: 28 in.

Explanation:

Perimeter of area = 4s

= 7 + 7 + 7 + 7

= 28 in.

Question 6.

Perimeter

= _______ + _______ + _______ + _______

= ______________

Answer: 46 ft

Explanation:

The perimeter P of a rectangle is given by the formula, P= l + w + l + w ,

where l is the length and w is the width of the rectangle.

Perimeter of area = l + w + l + w ,

= 20 + 3 + 20 + 3

= 46 ft

Question 7.

Perimeter

= _______ + _______ + _______ + _______

= _______________

Answer: 32 m

Explanation:

Perimeter of square = 4s

=8 + 8 + 8 + 8

= 32 in.

**Complete. Find the perimeter of each figure. Remember to show the correct unit in your answer.**

Question 8.

Perimeter = _______ + _______ + _______

= ______________

Answer: 18 cm

Explanation:

Perimeter of triangle = l + b + h

5 + 6 + 7 = 18 cm

Perimeter of a triangle is the sum of the lengths of the triangle,

the lengths are measured with ruler and the total is perimeter (P)

Question 9.

Perimeter = _______ + _______ + _______ + _______

= ______________

Answer: 18 in.

Explanation:

Perimeter = 3 + 4 + 5 + 6 =18 in

Perimeter of a parallelogram is the sum of the lengths of the parallelogram,

the lengths are measured with ruler and the total is perimeter (P)

Question 10.

Perimeter = ____________

Answer: 50 ft

Explanation:

Perimeter

= 10 + 9 + 15 + 9 + 7

= 50 ft

Question 11.

Perimeter = _____________

Answer: 37 m

Explanation:

Perimeter:

12 + 9 + 4 + 6 +6 = 37 m

Question 12.

Use your ruler or a measuring tape to find the perimeter of each figure or object.

Answer:

Explanation:

The measurements may vary from one to one,

depends upon the size and shape of the object.

So, we use the square centimeter and inch to estimate the perimeter of the objects.

Question 13.

Use your meterstick or yardstick to measure the perimeter of each object.

Answer:

Explanation:

Measurements may vary from one to one,

depending upon the size, shape of the objects.

So, we use the square meter and square feet to estimate the perimeter of the objects in our house.

**Solve.**

Question 14.

Sean walks along the edge of a rectangular field once to look for his lost keychain. How far does he walk?

Answer: 36m

Explanation:

Perimeter of a rectangle (P) = 2(Length + Width)

P = 2(10+8)

=2(18)

= 36 m

Question 15.

Alyssa wants to decorate this birthday card by pasting ribbon around it. What is the length of ribbon she needs?

Answer:

38 cm length of ribbon she needs.

Explanation:

Perimeter of a rectangle (P) = 2(Length + Width)

P = 2(12 + 7)

= 38 cm

Question 16.

Owen has two square cardboard pieces. Each side is 6 inches. He places them side by side to make a rectangle. What is the perimeter of the rectangle?

Answer: 48 in.

Explanation:

The perimeter P of a rectangle is given by the formula, P= l + w + l + w ,

where l is the length and w is the width of the rectangle.

Perimeter of area = l + w + l + w ,

= 12 + 6 + 12 + 6 = 48 in.

**Solve.**

Question 17.

Theo wraps tape around the top of this rectangular box twice. What is the length of sticky tape he uses?

Answer: 96 cm

Explanation:

The perimeter P of a rectangle is given by the formula, P= l + w + l + w ,

where l is the length and w is the width of the rectangle.

Perimeter of area = l + w + l + w ,

= 30 + 18 + 30 + 18 = 96 cm.

Question 18.

Each student in a group glued a string around a square with a side of 12 centimeters. There are 5 students in the group. What was the total length of string they used?

Answer: 240 cm

Explanation:

one student glued a string around a square with a side of 12 centimeters

lets calculated Perimeter of a square P= 4x s

P = 4 x 12

= 48 cm

5 students glued a string around a square with a side of 12 centimeters

5 x 48 cm = 240 cm the total length of string they used

Question 19.

The length of a rectangular pool is 4 times its width. If the perimeter of the pool is 140 meters, find the length and width of the pool.

Answer:

length is 56 meters and width is 14 meters

Explanation:

Perimeter of a rectangle P=2(l + w)

let width is x and the length is 4x as per the given information

140 = 2(4x + x)

140 = 2(5x)

140 = 10x

x = 14 meters width

length = 4 x = 4 x 14 = 56 m

Question 20.

Four square tables are arranged next to each other to form one large rectangular table. The perimeter of the large rectangular table is 20 meters. What is the perimeter of each square table?

Answer: 8 meters

Explanation:

the perimeter of a rectangle P = 2(l+b)

P = 2(4x+x)

=10 x

20 = 10x

x = 2m

the perimeter of each square table

P = 4 s = 4 x 2 = 8 meters.

Read More: